Data PolicyPublications | Persons | Institutes | Projects IMIS Photogallery » References Aporocidaris usarpi (primary spines) Description d. Oral primary spine, e. Aboral primary spine.d+e. Scale 10 mm. Author Schultz, Heinke JPG file - 29.97 kB - 276 x 1 157 pixels added on 2011-02-23304 viewsFrom reference Schultz, H. (2011). Sea urchins III: Worldwide regular de... © 2011 Schultz, Heinke Click here to return to the thumbnails overview